Emerson Process Management GmbH & Co. OHG
3-19
X-STREAM X2FD
Instruction Manual
HASXMDE-IM-EX
01/2015
3
Startup
3.9 Checking the settings
This prevents calibration from being perfor-
med when the incorrect gas is supplied (e.g.
span gas calibration using zero gas), which
would result in an incorrectly con
fi
gured unit.
"Hold on Cal": Speci
fi
es behaviour of analog
outputs and concentration limits alarms during
calibrations (follow measured value or not)..
“ Purge time”: When gas
fl
ow is controlled by
internal or external valves, these allow the
appropriate calibration gas to
fl
ow into the
unit as soon as the calibration procedure is
started. Due to the limited gas
fl
ow and the
distance between valves and measuring cell,
some time is required before the measuring
cell is
fi
lled with the calibration gas: this is the
purge time, which is to be entered here. If
the calibration is started earlier, the gas lines
will still contain other components and the
calibration will be inaccurate.
" Valve assignment": This line is to assign
internal and/or external valves the function
of either zero or span gas valve. Instruments
with internal valves are already factory setup.
If any of these parameters need to be
changed,
X-STREAM X2 instruction
manual for more information.
Note!
The line “
Purge time
” and the second menu
page are only displayed if the “
Valves
” para-
meter in the INSTALLED OPTIONS menu is
not set to none.
Calibration gases..
Tol.Check: Aus
Hold on Cal:
Yes
Purge time:
12 s
Purge time: 12
s
Page 1
Valve assignment..
Interval time..
Page 2
Valve assignment..
Interval time..